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No. 749,293. PATENTED JAN. 12, 1904. P. S.. INGLDS'BY 6L l.. R. BOWLING.

` BOLSTER.

APPLIoATIoN FILED un 9, 1903.

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UNITED STATES Patented January 12, 1904.

PATENT OFFICE.

`FRANK S. INGOLDSBY JOSEPH R. BOWLING, OFV ST. LOUIS, MISSOURI, ASSIGNORS TO THE INGOLDSBY AUTOMATIC CAR COMPANY, OF ST. LOUIS, MISSOURI, A OORPORATIONOF `WEST VIRGINIA.

BOLSTER.

SPECIFICATION forming part of Letters Patent No. 749,293, dated January 12, 1904.

Original application led February 2, 1903, Serial No. 141,415. Divided and this application filed May 9, 1903. Serial No. 156,358. (No model.)

To a/ZZ whom t may concern:`

Be it known that we, FRANK S. INGoLDsBY and JosErH It. BOWLING, both citizens of the United States, residing at St. Louis, inthe State of Missouri, have invented a certain new and useful Improvement in Bolsters, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

IO The invention relates to certain improvemerits in bolsters for railroad-cars, being designed -more especially with reference to dumping-cars of the Ingoldsby type.

The features which are peculiar to the present invention will be herein clearly described, and definitely set out in the claims, to which reference is hereby made. for a summary of the invention.

In the drawings, Figure 1 is a side elevation 2O of the bolster. Fig. 2 is a plan view thereof. Figs. 3 and 4 are cross-sections thereof on the correspondingly-numbered lines of Fig. 1.

The bolster J includes the lower compression member in the form of' a channel-beam j, a center frame j', and a tension-strap f2, the tension and compression members passing over the ends of the center frame and having their own ends secured together. The ridgeplate F, which is of the pattern usually employed in the Ingoldsby car, may pass through the bolster between the center frame and the tension-plate and be there secured by bolts 3'3, as shown and claimed in our application, Serial No. 120,922, tiled August 25, 1902.

At its outer ends the tension-strap f2 may be turned downward across the end of the compression member and .be surmounted by a stirrup ji, lying over the tension member and riveted to the sides of the compression member, as shown and claimed in application, Serial No. 121,155, by Messrs. Bowling and Lombard, 'filed August 27, 1902. The peculiar feature of the present bolster, however, is the additional tension-strap f5,

which is the full width and length of the bolster and passes between the center frame and the compression member andthen diagonally upward over the struts j and then downward along the tension-strap j2 and over the end of the compression member. The ends of the tension members f2 and j are riveted to an angle-clip f7, secured to the channel-beam j. These two tension-straps f2 f5, the stirrup ji, the compression member j, and a filler-block js are all riveted together by vertical rivets j. Beneath the center casting j and below the compression member is the usual center bearing j, while Within this channel member and substantially beneath the struts ,7'6 are the side bearings 712. When the load in the 00 car is evenly supported, the stress passes to the center bearing ju by means of tension in the strap f2 and compression in the channel member j and the center casting j'. When, however, the car-body tips by reason of centrifugal force o1' unequal loading, so that one side bears down on either side bearing, this makes an upward stress along the strut j, which stress is taken care of by the tensionstrap f5. This tension-strap jf' and the strut 70 je and the compression member j thus constitute a local truss taking care of the upward stress when the side bearings engage. This is the peculiar feature of this bolster and one of the important features of the present invention.

The main struts a' of the car side, the plates 0,3 of the side girders, and the channel-beams a, .which form extensions of the lower chord of the car sides, rest on and are secured to the stirrup-plates y" of the bolster. These details of the car side form no part of the invention covered by this application, the same being embodied in our application, Serial No. 141,415, filed February 2, 1903, of which this' is a di- 85 vision.v The diagonal I beams N, passing through the car from its ends to its sides, pass through the bolster and are secured by connecting-plates at to the struts f6.

Having described our invention, what we claim, and desire to secure by Letters Patent, is

l. In a bolster, a center frame, tension and Compression members secured thereto and oonnected together at their ends, a strut intermediate of said members and an additional tension member extending between the center frame and compression member and between the strut and tension member and connected at its end with the common end of the tension and Compression members.

2. In a bolster, the combination of tension and compression members, and intermediate strut members, of an additional tension-strap passing beneath one strut and over another and serving as a local truss to take the upward stress at the side bearing, said eXtra tensionstrap being of the full Width and length of the bolster and continuing near its ends alongside of the main tension-strap. l

3. In a bolster, the combination of a center FRANK S. INGOLDSBY. JOSEPH R. BOWLING.

Witnesses:

CHAs. H. MEYER, L. L. MoCULLoUGi-I. 

